Mold



March 21 1944.

J. B. SEIFERT MOLD Filed April 15, 1945 nut;

a2. Kai/e7 IN VEN TOR.

Patented Mar. 21, 1944 UNITED STATES PATENT OFFICE MOLD John B. Seifert,Springtown, Pa.

Application April 15, 1943, Serial No. 483,210

4 Claims.

This invention relates to molds such as used, for example, in castingconcrete burial vaults and the like. It is designed more especially asan improvement on the structure disclosed in Patent 1,649,549, issued tome on November 15, 1927.

Heretofore it has been difficult to prevent distortion of the inner moldmember during the casting operation because of the weight of thematerial used and the moisture therein. Furthermore, because of theconstruction of the inner mold, it has been difiicult to assemble it andalso to separate the parts for removal from the cast article.

An object of the present invention is to simplify the construction ofthe inner mold so that it can be more readily set up and taken apartthan heretofore and will also stand up more rigidly while in use.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

In the accompanying drawing the preferred form of the invention has beenshown.

In said drawing Figure 1 is a top plan view of the inner mold memberconstructed in accordance with the present invention and set up for use,the outer mold member associated therewith being indicated by brokenlines.

Figure 2 is a longitudinal section on line 2-2, V

Figure 1.

Figure 3 is a section on line 3-3, Figure 2.

Referring to the figures by characters of reference, I designates anL-shaped corner section which Gan be formed of any suitable material andis proportioned so that, when assembled with four other similar members,it will provide an inner mold of the proper size to produce the articleto be formed. This corner member includes a side section 2 and an endsection 3. A supporting strip 4 is connected to each side section 2 andextended longitudinally thereof adjacent to but below the top of thewall, this strip being spaced from the wall by interposed blocks 5 orthe like through which fastening bolts 6 or similar devices areextended.

A stiffening strip 1 is secured to the inner side of the end wall 3close to'the'iree vertical edge thereof and to this stiffening strip isattached an angle bracket 8. Another stiffening strip 9 is secured tothe] inner side of the side wall 2 close to the free vertical edgethereof and is provided with an upper ear' [0 and a lower ear llpreferablyintegral therewith while another or intermediate ear I2 issecured to the strip at a point between its ends. I 4

The Walls 2 and 3 are braced-relative to. each other by a diagonallydisposedstrip l3 attached at its ends to these walls as indicated at Mand 15.

As before stated four of these mold sections are used to complete aninner mold member. These sections are positioned in oppositely disposedpairs so that the free vertical edge portions of the end walls 3 of onepair will contact while the corresponding edge portions of the opposedend walls will also contact. Likewise the vertical free edge portions ofthe side walls 2 of each pair will contact.

After these four sections have been assembled end to end as shown inFig. 1, a coupling link I6 is placed on each pair of ears Ill andanother coupling link I! is placed on each pair of ears I l. Crossbraces in the form of rods l8 are then extended transversely of the moldand these rods have downturned ends I 9 which are inserted downwardlythrough the links 16 and the ears or brackets I0 thereunder. Thereafterother rods 20 corresponding with the rods l8 are positioned on the lowerlinks I! with their downturned terminals 2| extending through said linksand through the lower ears or brackets ll. Thus the side sections areheld together firmly and are properly spaced apart. Diagonal braces inthe form of rods 22 are provided with downturned ends 23 which areinserted in the intermediate bracket l2 and these rods are fastened attheir other ends to the respective brackets 8 to which they are joinedby pins, bolts, or other suitable fastening means shown generally at 24whereby the brackets 8 are drawn together and the braces or rods 22fastened in place.

With all of the parts assembled as herein explained, the members of theinner form are properly held relative to each other and When the form isplaced with the strips 4 uppermost, as in Fig. 2, a top panel 25 ofsheet metal or the like can be placed thereon where it will be supportedflush with the upper edges of the walls 2 and 3. With the mold inposition in an outer mold A, concrete can be poured between the moldsand over the plate 25 so that the structure to be .formed will thus beproperly produced. After the concrete has set the inner mold and theouter mold can be inverted, the outer mold removed and the members ofthe inner mold then disconnected and withdrawn in sections from the castarticle.

What is claimed is:

1. An inner mold member for use in casting hollow structures includingopposed pairs of sections, the sections of each pair being opposed andall of the sections being of the same proportions, means for detachablyjoining the end walls of the sections of each pair, brackets extendinginwardly from the side walls of the sections, connecting links mountedon the brackets, transverse braces, and means on the braces engaging thelinks and brackets for holding the links to the brackets and forstifiening the mold against transverse pressure.

2. An inner mold for use in casting concrete structures including cornersections arranged in oppositely disposed pairs, the sections of eachpair being oppositely disposed, brackets on the inner sides of the end.walls, means engaging the brackets for binding said end walls together,brackets on the inner sides of the side walls, connecting links mounted.on the brackets, transverse stifiening rods supported by the brackets,means on the rods and extended through the links and side brackets forholding the rods, links and brackets assembled.

3. An inner mold for use in casting concrete structures including cornersections arranged in oppositely disposed pairs, the sections of eachpair being oppositely disposed, brackets on the inner sides of the endwalls, means engaging the brackets for binding said end Walls together,brackets on the inner sides of the side walls, connecting links mountedon the brackets, transverse stiffening rods supported by the brackets,means on the rods and extended through the links and side brackets forholding the rods, links and brackets assembled, and diagonally disposedreenforcing means within each corner section and connected detachably tothe side and end wall of said section.

4. An inner mold for use in casting concrete structures including cornersections arranged in oppositely disposed pairs, the sections of eachpair being oppositely disposed, brackets on the inner sides of the endwalls, means engaging the brackets for binding said end walls together,brackets on the inner sides of the side walls, connecting links mountedon the brackets, transverse stiffening rods supported by the brackets,means on the rods and extended through the links and side brackets forholding the rods, links and brackets assembled, supporting stripssecuredv to the inner sides of the side walls, and a panel removablymounted on the strips.

JOHN B. SEIFERT.

